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Main => Monitor/Video Forum => Topic started by: SirPeale on May 20, 2008, 11:01:00 pm

Title: Old Rejuvenator - Making an Adapter
Post by: SirPeale on May 20, 2008, 11:01:00 pm

A buddy of mine gave me a Sencore CR143 a while back.

This thing is a dinosaur - last made in 1970.  It's so old that the tubes given in the manual are mostly black and white.  15 pages of BW tubes, vs *3* for color.

There is a color adapter, and since I'm 99% I'll never use it, I've sacrificed it to make a socket that'll work with most arcade tube - in the realm of a B&K Socket 23.

So I cut the wires off the original socket, and I'm matching them up on the socket I'm going to solder to.  Except....

On the old one I've got RGB G1, and RGB G2.  On the newer tube I only have Green G1 and G2, the others are RGB *K*.  And then there's G3, G4 and G5.

Am I just deluding myself that I'll be able to use this rejuvenator on a more modern tube?

Title: Re: Old Rejuvenator - Making an Adapter
Post by: amadama on May 21, 2008, 05:24:22 pm

Hi Peale,
Do these CRT rejuvenators really work?  I read an article stating that these were a "do or die" sort of thing, could work but may destroy the electron guns altogether.
Alex

Title: Re: Old Rejuvenator - Making an Adapter
Post by: SirPeale on May 21, 2008, 05:31:17 pm

That is correct.  It's a crapshoot.  Might make things all better, might kill your tube altogether.

In my case, I just wanted to use this to test for shorts in the tube. 

Title: Re: Old Rejuvenator - Making an Adapter
Post by: SirPeale on May 22, 2008, 04:33:05 pm

Using this document: http://www.bkprecision.com/download/documentation/100-CRT.pdf I've been able to get the pinout for a B&K socket 23.  I think I've got it like 60% correct, but I'm not going further until I know I'm doing this right.

So far I've got G2 R to 8, G to 6 and B to 11. G1 I haven't hooked up so far, but it looks like I need to hook G1 green to pin 5, and tie a connection to pin 7 from pin 6 (G2 green). I haven't done it yet because I was concerned that I'm wrong about that.

Red G1 and Blue G1 don't have a connection at all on the 23. That doesn't seem right to me, but for all I know that's correct.

Then there's the yellow wire, which on the Sencore pinout states that it's "cathode". Nothing on the B & K states cathode, but there is G3, G4, G5

Title: Re: Old Rejuvenator - Making an Adapter
Post by: SirPeale on June 18, 2008, 03:30:58 pm

Revisiting this...I started a page documenting what I've done so far.  Haven't finished or used it yet, I don't want to screw up!

http://www.pealefamily.net/tech/sencore/

Title: Re: Old Rejuvenator - Making an Adapter
Post by: Ken Layton on June 20, 2008, 01:43:42 pm

Right around 1970 color picture tube design changed so it presents a problem translating old electrical design to the modern design.

I have no experience with the Sencore rejuvenators.

Title: Re: Old Rejuvenator - Making an Adapter
Post by: SirPeale on June 20, 2008, 03:45:55 pm

I'm pretty sure it can be done, but it hasn't been easy.